Stayed Viaduct in Bucaramanga, Colombia

摘要

The Carrera Novena viaduct in Bucaramanga is situated over a wooded area of great environmentalimportance which must be respected. The proposed viaduct with a principal span of 292.4m andtwo compensation spans 129.2m long. The maximum height over the ravine is 75m and the piers ofthe viaduct have heights of 52m and 72m; for this reason singles piers have been used, over whichthe towers have been built which stay the deck in its axis. It is 30m wide because 6 lanes of trafficand 2m wide pedestrian walkways were planned. The structure of the deck is formed of a singlecellbox girder with a trapezoidal section and a depth of 2.8m. This girder is extended laterally byslabs. Its width creates significant bending moments which are resisted by interior transversetriangulations and exterior struts every 3.4m. It is situated in a zone of high seismic activity and forthat reason a structure has been adopted which is encastred in the piers and free in the abutments. Itwas constructed using successive compensated cantilevers, and concreted in situ.